AT&T 6300 Programmer's Manual page 92

Disk File Handling
NAMING DEVICES
The device name consists of up to four charac-
ters and is always followed by a colon (:). The
colon must always be used whenever a device is
specified. The device name may be one of the
following:
4-8
A:
B:
C:
D:
KYBD:
SCRN:
LPT1:
LPT2:
LPT3:
COM1:
COM2:
COM3:
COM4:
first diskette drive (Input and Output)
second diskette drive (Input and
Output)
first hard disk drive (Input and
Output)
second hard disk drive (Input and
Output)
keyboard (Input only)
screen (Output only)
first printer (Output only)
second printer (Output only)
third printer (Output only)
RS232 Communications 1
(Input and Output)
RS232 Communications 2
(Input and Output)
RS232 Communications 3
(Input and Output)
RS232 Communications 4
(Input and Output)